XT 111 



CONTENTS, 



CHAP. VI. page 345. 



Of Thunder and Lightning, Meteors, Water-Spouts, &c. 

 fheory cf Lightning. Defcription of a Thunder Storm. Obfervatior.s 

 relative to the EleBricity of the Atmofphere . Melting of Metals by 

 the Cold Fufion a vulgar Error. Condudors of Lightning. How 

 to be fafe in a Thunder Storm. Application of EleSricity to other 

 atmofphericalPknomena.-r-Rain.HwL Snow. Meteors. Wa- 

 ter-fpouts. 



CHAP. VII. page 359. 



Medical Eledricity. 



Declaration of the Abie Nollet on this Subjefl. -Mr. Adams an Ad- 

 vocate for Medical Eleflricity . Mode of Application. Dijeafes 

 to which it may be applied. Apparatus mojl proper for Medical 

 Purpofes. 



BOOK V. 



OF AIR. 



CHAP. I. page 362. 

 Hiftory of Difcoveries relative to Air. 



Vagut Notions of the early Chemijis. Van Helmont.Choak and Fire 

 Damp. Mr. Boyle. Difcoveries of Dr. Hales. Of Dr. Black. 

 Of Dr. PrieJlhy.Of Mr. Cavendifo. Of La-voider. Vital or 

 dephlogijiicated Air difcovered by Dr. Prieftley. Compojition of 

 Water and of Nitrous Air difcovered by Mr. Cavendijh. 



CHAP. II. page 371. 



Of Oxygen Gas, or Pure, Vital, Empyreal, or Dephlogifticated Air. 



Explanation of Terms.- Reafons for the different Names aligned to 

 this Fluid. How procured. From CaLes of Metals. By Vege- 

 tation. From Water. Properties of Oxygen Gas A powerful 



Agent in the Syftem of Nature.^How ejfentialto Flame and Life. 

 Various Mode: provided by Nature for furnijhing a Supply (f this 

 Fluid. 



CHAP. III. -page 382. 

 Azotic Gas, or Phlogiflicated Air. 



Azotic Gas is the unrrfpirable Part cf the Atmofpbere.-HoT.v pro- 

 cured. Air Bladders of Fijhes filed with it. Iti Propertits.-^ 

 Azote tbt Ba/is of nitrous jcjd. 



CHAP. 



